I'm a little late to the party I haven't followed this case that closely but I personally believe this was a premeditated murder. I was, however, keenly interested to hear what Leanne had to say, so listened to her earlier testimony yesterday afternoon as I was working.
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Disclosure: EVERYTHING written here is my personal opinion, speculative and admittedly not fully informed.
The first half of testimony LT was a sympathetic figure. Strong witness for the defense. I wholeheartedly believed her explanation for the 'Did you say too much?'comment. Overall, she came across truthful. I will say I think the defense did a stellar job prepping her.
On cross I found her to be a passive-aggressive, hostile witness who pretty much lost all credibility with me. Among other things, she was politely combative and she came across as someone who would say just enough negative things about RH to remain somewhat believable. Not out of a sense of finding the truth mind you, but rather she dared not give them anything truthful because it wouldn't bode well for the man she divorced (on paper only.)
I believe the divorce was nothing more than a strategy, as the fact she hasn't had contact with him since January (or whenever it was.) Not buying the new boyfriend claim either.
I do not believe she knew of her husband's plans that morning, nor did she ever wish her son dead, but I think she knew her RH was unhappy in the marriage and wanted out. She knows him probably better than he knows himself and it certainly wouldn't be a stretch to for her to think he would do the unthinkable if he felt trapped. I think she probably got pregnant to keep him from leaving, although there's nothing out there to suggest this. I also think she knew from the very minute she found out her son was dead what had happened and it came as absolutely no surprise to her. None at all. She may have even been subconsciously waiting for something like this TO happen.
I think she has an unhealthy addiction RH. Perhaps she thinks his failures are a reflection of her. In the abstract maybe there's some truth to that. Regardless, something is terribly amiss. She's a cute gal who could do so much better. Physical appearance and bad habits don't define someone but RH is the type of guy that any random photo of him tells the WHOLE STORY. He is all things epic loser. You just can't draw any other conclusion. He has absolutely zero redeeming qualities. You can be ugly, you can sport a mullet, you can be mushy, you can be a cheater, an unkempt slob, a philanderer, a pedophile, a sub par employee, broke and selfish but you can't be ALL of those things and have some hidden, magnetic quality. What's left to respect and/or love? No NORMAL woman could love that, especially after he killed his own child, intentionally or otherwise.
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Anyway, being the awesome catch that he was, LT's biggest 'fear' after finding out her son was dead was that he'd probably ditch the marriage now that there was nothing holding them together. That's why she asked him about having more kids in the interview room. IMO, she has EXTREME FEAR OF ABANDONMENT. Her number one priority is protecting herself from it - no matter the cost. RH has always been her #1 priority. It explains why she is defending the responsible for her son's death, yet pausing long enough to let us know what an utter pig of a man he is. ‎Well, except for being an outstanding father, that is. Yeah, sure thing.
A normal mother whose lost her child can't be completely objective about that loss. Emotions & grief cloud judgement. It's just human nature. The only way you can objectively evaluate a personal, tragic loss is to lack the normal emotional state which accompanies it. But here she is, a grieving mom who can be as neutral as Juror Jane in evaluating her own fresh hell. She claims she didn't know the depth of her husband's sex addiction (she did) and although Mr. McFreaky was leading an adulterous, double life, she can objectively state he isn't capable of murdering his son (he is.) Except for in movie theaters, how does that work, exactly? Either way, it's clear to me LT wasn't emotionally invested in her own child. Her bond is to RH and only RH.
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Yes, he was horrible person who did horrible things and ruined her life (never mind, you know, her son's life) but really, he was a fabulous dad who lacked motive to get rid of his kid. No, I'm sorry but no one gets to live a calculated defense strategy in real life. Cooper was a pawn in HER marriage. She used him to keep her husband from bailing and she's still using him to make sure this perfect, doting dad isn't held accountable. She's protecting HERSELF from abandonment with the empty promise she & RH will reunite after he walks free.
She knew from the moment she heard Cooper was dead that his dad killed him. She knows deep down it wasn't an accident and it's because of that very fact she rushed in to protect him, to save him, to save herself from losing everything. Her behavior that day was atypical to such a degree anyone who saw the video knew she had to be involved. She was involved, just not in a premeditated or conscious way.
I absolutely believe she did have an irrational fear of Cooper being left to die in a car, but it wasn't a fear based on behalf of losing her son, it was fear based on what his horrific death would mean for HER MARRIAGE.
(As a side note I also think RH went to his car at lunch to check on CH's 'progress.') ‎
She is loyal to Eugene from The Walking Dead until the bitter end. It's pathological really, and she will never allow herself to acknowledge the raw truth. For she herself is also culpable for CH's death by the mere fact I believe she knew her RH was capable of such selfish evil but didn't take steps to protect her child from it. It is why a 'hot car death' was her 'biggest fear' and something she apparently frequently discussed with him.
Even though I think RH is guilty there's a fair chance he'll walk with time served or a little more for lesser charges. I think there's probably enough doubt here for the average, smoking gun juror. And as soon as he walks out of prison he will step right over LT getting to his Carlos Danger account. She'll grieve then, but never for her helpless son or the hellish death he experienced at the hands of his wonderful daddy. Because after all, "He's better off dead than existing in this cruel world." Isn't that basically what she said at his funeral? ICK.